I play on Phoenix and Hyperion pretty much every night (UK times), I see none of the the lag you claim is there making the game "90% unplayable for a huge population" and nor do most of those in the FCs I play in.

Quoting PING times of 4-10 clearly shows you don't understand what they are and what they mean, you CAN'T have times that short and in any case ping times of 150 are fine; I raid just fine in WOW and LOTRO with times like that, FFXIV is no different.

I had HUGE lag at first, till my ISP STOPPED THOTTLING P2P, I suggest you take it up with them, since BT stopped that customer-hostile practice I've played with barely a glitch for the last 6 weeks.